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The difference of the genus Cyriocosmus in whole from all other Theraphosinae subfamilies, consists of the following diagnosis: the male can be distinguished from all other theraphosids, except some Hapalopus species, by the presence of a paraembolic apophysis on male palpal bulb (in two species – C. perezmilesi and C. blenginii this character is reduced).

Male Cyriocosmus can be distinguished from Hapalopus by the divergent branches on the tibial apophysis. The female can be distinguished from all other theraphosid species by having a sinuous or spiral spermathecae neck with a convex base. The only presented modified type III urticating hairs having short barbs along more than half of its length.

Scientific classification

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Chelicerata
  • Class: Arachnida
  • Order: Araneae
  • Infraorder: Mygalomorphae
  • Family: Theraphosidae
  • Genus: Cyriocosmus


Most of Brazil has high annual average temperatures, above 22°C (72°F). Only in the South and in the highest elevations does the average fall below this.

A tropical wet climate characterizes much of northern Brazil, with abundant rainfall and little or no dry season. Temperatures average 25°C (77°F). Rainfall averages about 2,200 mm (about 90 in) a year. Over central Brazil rainfall is more seasonal, characteristic of a savanna climate. Eighty percent of the rain falls in summer (October through March). Here rainfall averages about 1,600 mm (about 60 in) a year. In the interior Northeast, seasonal rainfall is even more extreme. The semiarid region receives less than 800 mm (30 in) of rain, which falls in a period of two or three months.


Don’t let size fool you, these animals can take down same sized prey with ease. They are insectivores and so you want to make sure you feed them appropriately. We recommend you feed them flightless fruit flies as slings and slowly upgrade to small pinhead crickets to eventually large pinhead crickets and even b.dubia cockroaches. Feeding should be done once a week and should your tarantula not eat its prey within 24 hours remove the prey from its enclosure. It could be that he/she is in pre-molt stages and you will want to make sure you do not stress him/her out.


The Trinidad Dwarf Tiger Tarantula is very fast. Though they are mostly docile we recommend you not handling them due to their speed. They come equipped with urticating hairs and though they might not be known for biting it does not mean they do not bite should they feel threatened. Their bite is equivalent to a bee sting and their venom harmless to humans.

Cyriocosmus images

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